Transverse bulkhead

Transverse bulkheads were specialized partitions utilized by the steamship RMS Titanic in the 20th century. Designed to keep the ship afloat in the event of a hull breach, these special bulkheads were intended to lower into place, forming a honeycomb-like structure. In theory, utilization of these bulkheads would prove successful in saving the ship even if half of it were filled with water.